Upgrading to 2Ltr In my NA6..YEAH!

[daffyflyer]

Speaking of which, what is the maximum engine size you can go from stock? Is it an incrase of 10%?

Topic is a little old but it could be useful to know.

Based on an NA; In NSW its 4L for naturally aspirated, 2.6L for forced inducted, and if its a rotary you double the cc's to get the equivalant piston engine dispacement. I assume Victoria would be pretty similar.

So 1uzfe or rb26dett then?

[16bit]

no way, NA 20b triple rotor for me. 400hp and 10krpm. or possibly a cosworth dfv 3L v8 (dfr edition with 640hp at 11krpm). Or even better a cosworth dfx 2.6 twin turbo v8 with about 840hp.

[bruce]

Based on an NA; In NSW its 4L for naturally aspirated, 2.6L for forced inducted, and if its a rotary you double the cc's to get the equivalant piston engine dispacement. I assume Victoria would be pretty similar.

That doesn't sound quite right - you can't just drop a 4.0lt Lexus v8 donk straight into a 5 legally.

[GS]

no way, NA 20b triple rotor for me. 400hp and 10krpm. or possibly a cosworth dfv 3L v8 (dfr edition with 640hp at 11krpm). Or even better a cosworth dfx 2.6 twin turbo v8 with about 840hp.

Haha. I can picture it now. "Honey, im going down to the shops in my MX-DFV to pick up some milk". Twenty minutes later you're still sitting in the garage while 2 mechanics shovel buckets of dry ice into your radiator, another 2 mechanics are hovering around the with the remote starter, and the engineers are busy on the laptops trying to load the right start procedure for you!!

[bruce]

840hp.

The MX5 would instantly flip over due to the torque of the motor.

[bruce]

No worries. I remember years ago there was chat regards getting an engineer to sign off on the 5 to weigh a lot more so you could squeeze a bigger motor legally into it. It would have to weigh 1300kgs (we're talking factory weights here) to get a 4lt Lexus donk into it.
And then when you try to get it registered at VicRoads, they would call their own Engineer and then politely kick you out the door!

[16bit]

no way, NA 20b triple rotor for me. 400hp and 10krpm. or possibly a cosworth dfv 3L v8 (dfr edition with 640hp at 11krpm). Or even better a cosworth dfx 2.6 twin turbo v8 with about 840hp.

Haha. I can picture it now. "Honey, im going down to the shops in my MX-DFV to pick up some milk". Twenty minutes later you're still sitting in the garage while 2 mechanics shovel buckets of dry ice into your radiator, another 2 mechanics are hovering around the with the remote starter, and the engineers are busy on the laptops trying to load the right start procedure for you!!

i will have it de tuned and with a starter motor. will be perfectly drivable above 8k!